Smartpens and Pencasts

A Smartpen is a digital pen containing a microphone, infrared camera, a processor, and memory. With a smartpen it is easy to record notes, sketches, and a narration. Such a recording is called a 'pencast' and can be exported as a PDF document.

Pencasts are useful for explaining theory, mathematical proofs, equations etc. and to feedback which can not be explained by regular text. You can read more about smartpens at